选用两个半硬质胚乳奥帕克-2玉米群体(T_(34)QPMC_3和陕综5号/O-2C_0)为试材,采用胚乳硬质度0、1、2、3、4五级分类法,在硬质梯度基础上,探讨了单株赖氨酸产量、籽粒物理性状、营养品质性状的简单相关、典型相关分析,提出了赖氨酸与奥帕克-2主基因及其修饰基因调控体系的关系。结果表明:(1)籽粒物理性状中,硬质度、籽粒密度、百粒重与胚比、百粒体积呈负相关效应;(2)营养品质中,赖氨酸含量、蛋白质品质性状是其核心;(3)籽粒密度(或硬质度)可作为蛋白质品质的间接选择指标;(4)籽粒物理性状、蛋白质品质性状在赖氨酸产量构成中起决定性作用;(5)全籽粒蛋白质品质与胚乳蛋白质品质紧密相关,而与胚蛋白质品质无关,高赖氨酸高油分育种相统一;(6)重视赖氨酸含量、蛋白质品质、百粒重、籽粒密度等性状,对实现半硬质高产优质蛋白玉米育种目标是极其重要的。 Two semi-rigid endosperm Opaque-2 maize populations (T_ (34) QPMC_3 and Shanshan No. 5 / O-2C_0) were selected as the test materials and the endosperm hardness 0, 1, Method, simple correlation and typical correlation analysis of single plant lysine yield, grain physical properties, nutritional quality traits were discussed on the basis of hard gradients. The regulation of lysine and Opaque-2 main genes and their modified genes System of relations. The results showed that: (1) There was a negative correlation between hardness, grain density, 100-grain weight and embryo ratio and 100-grain volume in the grain physical traits; (2) lysine content and protein quality traits were Core; (3) grain density (or hardness) can be used as an indirect selection index of protein quality; (4) grain physical traits and protein quality traits play a decisive role in the formation of lysine; (5) Which is closely related to the quality of endosperm protein, but has no correlation with the quality of embryo protein, and the unity of high-lysine high-oil breeding is uniformed; (6) The importance of lysine content, protein quality, hundred kernel weight and kernel density, High yield, high quality protein The goal of maize breeding is extremely important.